What does it mean if a man calls his wife the warden?

Well, honey, if a man calls his wife the warden, he's probably jokingly saying she runs a tight ship and keeps him in line. It's a playful way of acknowledging who's really in charge in their relationship. But hey, if she's not a fan of being compared to a prison guard, he might want to find a new nickname before he ends up in the doghouse.